On wind - an elementary clarification

When the ATC gives you the wind direction and speed, are they at any
particular point on the runway like its longitudinal center or takeoff
threshold, or is it simply the average over the runway length?

Thanks in advance,

Ramapriya

In article ,
Clark wrote:

D Ramapriya wrote in news:d9bb1ebf-f62e-4bfa-badd-
:

When the ATC gives you the wind direction and speed, are they at any
particular point on the runway like its longitudinal center or takeoff
threshold, or is it simply the average over the runway length?

The wind is reported for the location of the sensor.

The sensor may be located such that it represents the "average" wind for the
field. However, I know of airports where it doesn't represent the average
wind because of terrain shielding. Some airports have multiple sensors and
then the wind report is likely the sensor considered most relevant to the
active runway.

It's always nice when there are multiple windsocks and you can get a good
picture of surface winds. Of course surface winds may not be any indication
of the wind at pattern altitude...

My home field has two wind socks and a tetrahedron in fairly close
proximity. On a typical flying day it is not unusual to see each one of
them pointing 120 degrees away from the other two, or the two wind socks
pointing towards or away from each other.

In short, never trust the stuff too far....

--
Mike Ash
Radio Free Earth
Broadcasting from our climate-controlled studios deep inside the Moon

On Sep 16, 11:14*pm, Clark wrote:
D Ramapriya wrote in news:d9bb1ebf-f62e-4bfa-badd-
:

When the ATC gives you the wind direction and speed, are they at any
particular point on the runway like its longitudinal center or takeoff
threshold, or is it simply the average over the runway length?

The wind is reported for the location of the sensor.

The sensor may be located such that it represents the "average" wind for the
field. However, I know of airports where it doesn't represent the average
wind because of terrain shielding. Some airports have multiple sensors and
then the wind report is likely the sensor considered most relevant to the
active runway.

It's always nice when there are multiple windsocks and you can get a good
picture of surface winds. Of course surface winds may not be any indication
of the wind at pattern altitude...

--
---
there should be a "sig" here



I concur
http://www.youtube.com/watch?v=WXybnTbjBl8

On Sep 17, 12:26*am, Clark wrote:
Mike Ash wrote :





In article ,
*Clark wrote:

D Ramapriya wrote in
news:d9bb1ebf-f62e-4bfa-badd-
:

When the ATC gives you the wind direction and speed, are they at any
particular point on the runway like its longitudinal center or
takeoff threshold, or is it simply the average over the runway
length?

The wind is reported for the location of the sensor.

The sensor may be located such that it represents the "average" wind
for the field. However, I know of airports where it doesn't represent
the average wind because of terrain shielding. Some airports have
multiple sensors and then the wind report is likely the sensor
considered most relevant to the active runway.

It's always nice when there are multiple windsocks and you can get a
good picture of surface winds. Of course surface winds may not be any
indication of the wind at pattern altitude...

My home field has two wind socks and a tetrahedron in fairly close
proximity. On a typical flying day it is not unusual to see each one of
them pointing 120 degrees away from the other two, or the two wind socks
pointing towards or away from each other.

In short, never trust the stuff too far....

I always like it when the windsocks on each end of the runway point at each
other...

--
---
there should be a "sig" here

that is helpful to spot signs of windshift on takeoff roll or
windshear

http://www.youtube.com/watch?v=WXybnTbjBl8